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Installation and operating instructions • Wilo-Control SC2.0-Booster • Ed.01/2023-09 21
When connecting shielded cables without using EMC threaded cable glands or shield
clamps, the cable shield should be connected to the earth rail of the control device as a
“pigtail”.
6.2.2 Mains connection
DANGER
Danger of death due to electrical current!
The external electrical power supply is also present at the terminals when
the main switch is switched off!
• Disconnect the external power supply before any work.
NOTICE
• Depending on the system impedance and the maximum connections/
hour of the connected consumers, voltage fluctuations and/or drops
may occur.
• When using shielded cables, attach the shielding to the earth rail on
one side of the control device.
• Always have connection carried out by a qualified electrician.
• Observe the installation and operating instructions for the connected
pumps and signal transmitters.
• The mains type, current type and voltage of the mains connection must match the de-
tails on the rating plate of the control device.
• Fuse on mains side in accordance with the information in the circuit diagram.
• The 4-wire cable (L1, L2, L3, PE) is to be provided on-site.
1. Connect the cable to the main switch (Fig. 1-3, item 1) or, in the case of systems with
a higher output, to the terminal strips according to the circuit diagram, PE to the earth
rail.
6.2.3 Pump connections
CAUTION
Damage to property due to incorrect installation!
An incorrect electrical connection will damage the pump.
• Observe the installation and operating instructions for the pumps.
Mains connection
1. Connect the pumps to the mains connection at the terminal strips according to the cir-
cuit diagram.
2. Connect PE to the earth rail.
Connection of thermal winding contact (version: SC)
CAUTION
Property damage due to external voltage!
External voltage at the signal terminals will damage the product.
• Do not connect any external voltage to the terminals.
Connect the thermal winding contact (WSK) of the pumps to the terminals according to the
circuit diagram.
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